docs: def _line_parse(line):
      """Removes line ending characters and returns a tuple (`stripped_line`,
      `is_terminated`).
      """
      if line[-2:] in ['\r\n', b'\r\n']:
          return line[:-2], True
      elif line[-1:] in ['\r', '\n', b'\r', b'\n']:
          return line[:-1], True
      return line, False